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특허 상세정보

MyON담기
내보내기 페이스북 공유 카카오톡 공유

Process of preparing microcapsules of lactides or lactide copolymers with glycolides and/or e

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) A61K-009/52    B01J-013/02   
미국특허분류(USC) 264/43 ; 264/41 ; 424/19 ; 424/21
출원번호 US-0722102 (1985-04-11)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 120  인용 특허 : 10
초록
▼

A process for preparing polylactide (PLA) microcapsules is described and involves dissolving PLA in a mixture of two miscible organic liquids, the higher vapor pressure liquid having solvent power for PLA and the second having little or no solvent power for PLA. The solution is prepared such that it is near its saturation point for PLA. Encapsulation of dispersed core material is achieved by vaporizing the liquid having solvent power for PLA causing phase separation of the PLA, then transferring the separated dispersion to an organic liquid having no sol...

대표
청구항
▼

A process for preparing a microcapsule having an aqueous functional core material encapsulated in a PLA which comprises: (a) dissolving PLA in a mixture of two miscible organic liquids, the first being a liquid having solvent power for PLA and the second having little or no solvent power for PLA, the two liquids being present in a ratio such that the solution is near its saturation point for PLA, the liquid having solvent power for PLA having a vapor pressure significantly higher than the vapor pressure of the second liquid, (b) agitating the solution of...

이 특허에 인용된 특허 (10)

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